Geology Cafe

Introduction to Geology

Quiz 11 - Streams and Groundwater
1. The circulation of water among the hydrosphere, atmosphere, solid Earth, and biosphere is called:
a. uniformitarianism
b. hydrologic cycle
c. transpiration
d. the water system
e. precipitation

2. Which of these factors contributes to stream velocity?
a. stream gradient
b. stream channel size
c. stream channel shape
d. all of the above.

3. What is discharge?
a. a stream's cross-sectional area multiplied by its velocity
b. the volume of a stream divided by it's cross-sectional area
c. the width of a stream time it's depth
d. the amount of water flowing past a certain point in a given amount of time
e. both a and d

4. Which river has the largest discharge?
a. Nile
b. Amazon
c. Yangtze
d. Congo
e. Mississippi

5. What is the downward limit of stream erosion called?
a. head
b. water table
c. gradient
d. discharge
e. base level

6. Rivers tend to constantly change their course over a floodplain over time. This process is called:
a. change in gradient.
b. change in base level.
c. meandering.
d. levee formation.
e. all of the above.

7. The interval between the water table and the land surface is called:
a. phreatic zone.
b. vadose zone.
c. capillary fringe.
d. cone of depression.
e. flood zone.

8. The rolling and hopping motion of sediment particles on the stream bed caused by stream flow is called:
a. suspension.
b. saltation.
c. bedload.
d. gravel.
e. all of the above.

9. A region underlain by limestone that has subterranean erosion is called:
a. a cavern.
b. karst.
c. a floodplain.
d. a delta.
e. a levee.

10. The ability for rocks or sediment to allow the movement of groundwater is called:
a. porosity.
b. permeability.
c. discharge.
d. artesian.
e. drawdown.

Extra credit: Natural features formed by the accumulation of freshwater limestone (travertine) on the roof, walls, and floors of a cavern are called:
a. speleothems.
b. stalagmites.
c. stalactites.
d. troglodytes.
e. flowstone.